If you are going to run virtual machines in LXC containers it is nice to
let each one have a console on your physical box. You can do this
thusly…

Note: we are going under the knickers of lxc. It may not appreciate
having its config files changed, but I didn’t find an exposed command to
accomplish this.

Take some virtual consoles away from the main container. Edit your
/etc/inittab and comment out the four lines for tty3 to tty6. We
will save these for the containers.

kill -HUP 1

Now we will give tty3 to my container named rattus. You will replace
rattus with your machine name.

Go to /var/lib/lxc/rattus.

Edit cgroup. The devices like 4:N are the virtual console terminals.
We want to have a line 4:3 and no other 4:N where N is an integer.

Do the same for config.

Cut rattus down to two virtual consoles, the kind that can be used
with lxc-console. This will be tty1 and tty2 leaving tty3 to be the
real one. Edit /var/lib/lxc/rattus/ttys to be a 2 instead of a 4.
Beware: There is a NUL after the digit. It may be important. Emacs
will preserve it.

Edit the ROOT/etc/inittab file and comment out the getty line for
tty4 since we don’t get to use it and it won’t have a virtual
console on it. While you are in here, take out the console line as
well. I think it is responsible for the spurious login prompts while
you are working in the other consoles.